// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////

package subtle

import "github.com/google/tink/go/tink"

// EciesAEADHKDFDEMHelper a helper for DEM (data encapsulation mechanism) of ECIES-AEAD-HKDF.
type EciesAEADHKDFDEMHelper interface {

	// GetSymmetricKeySize gives the size of the DEM-key in bytes
	GetSymmetricKeySize() uint32

	// GetAEAD returns the newly created AEAD primitive.
	GetAEAD(symmetricKeyValue []byte) (tink.AEAD, error)
}
